Even if you don't fear fatty foods, you may have been reluctant to rely on them as fuel for exercise. A new review of scientific studies shows that a fat-heavy diet can work well for runners and cyclists, although it may take a few weeks for your body to adapt.

There are some caveats: It may take a few weeks for your body to adapt to a high-fat diet (three weeks for cyclists in one of the studies) and it may never work well if you're doing sports that require sudden bursts of power or strength, like weightlifting, Crossfit, or team sports like football. But if you're gearing up for a marathon or a long bike race, bacon-heavy breakfasts might suit you just fine.